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Testing crop row placement and pre-emergence herbicide options for brome grass on Mallee sand

2016

Research organisation
Funding source
CSIRO - Agriculture and Food
<abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Navneet Aggarwal (UoA)
Bill Davoren (UoA)
Gurjeet Gill (UoA)
Vadakattu Gupta (CSIRO)
Marcus Hicks (CSIRO)
Sam Kleemann (CSIRO)
Stasia Kroker (UoA)
Rick Llewellyn (CSIRO)
Therese McBeath (UoA)
Christopher Preston (UoA)
Willie Shoobridge (UoA)
Year(s) 2016
Contributor CSIRO - Agriculture and Food
Trial location(s) Karoonda, SA
Testing crop row placement and pre-emergence herbicide options for brome grass on Mallee sand locations
Aims

To investigate the interactions between pre-emergence herbicide options and crop row placement.

Key messages
  • Substantially better brome control and seed set reduction is possible with pre-emergence options other than trifluralin.
  • The costly Sakura+Avadex treatment is likely to be the most effective.
  • Consistency of performance of all pre-emergence herbicides for brome remains a problem
  • On-row seeding on non-wetting sand can substantially improve early crop emergence in part due to increased surface soil water accumulation in rows at time of seeding.
  • Seasonal conditions such as the long wet season of 2016 will affect efficacy of both pre-emergence herbicides and the impact of additional crop competition on brome seed set suppression.
  • Maintaining low seedbanks and having alternative options for weed seed control when faced with a risk of ‘blowouts’ in brome seed set is important given the chance of particularly poor control in some seasons.
Lead research organisation CSIRO - Agriculture and Food
Host research organisation N/A
Trial funding source GRDC MSF00003
Related program Maintaining profitable farming systems with retained stubble
Acknowledgments

This work was funded under the GRDC Stubble Initiative in partnership with MSF and CSIRO. Thanks to site hosts Peter and Hannah Loller and Damian Mowat for additional technical support and input from Jeff Braun and Michael Moodie.
Other trial partners Mallee Sustainable Farming.
Download the trial report to view additional trial information

Method

Crop types Cereal (Grain): Wheat Weed: Brome grass
Treatment type(s)
  • Herbicide : Timing
  • Sowing : Timing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Karoonda 2016 Wheat

Sow rate or Target density seed sown @ 70 kg/ha
Sowing machinery

Wheat (c.v. Kord) was then sown at 70 kg/ha using knife points (28 cm spacing) into retained stubble from the 2014 cereal crop.
Sow date 31 May 2016
Harvest date Not specified
Plot size Not specified
Plot replication 4
Fertiliser

50 kg/ha DAP and 45 kg/ha Urea applied at seeding

Karoonda 2016 Brome grass

Sow rate or Target density Not specified
Sowing machinery Not specified
Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Brome grass panicles (panicles/m2)
1 █ Nil On row 34
2 █ Nil Inter row 45
3 █ Trifluralin (2.5) On row 3
4 █ Trifluralin (2.5) Inter row 7
5 █ Trifluralin (1.5) + Avadex (1.6) On row 28
6 █ Trifluralin (1.5) + Avadex (1.6) Inter row 22
7 █ Sakura (118) + Avadex (1.6) Inter row 1

Brome grass panicles panicles/m2

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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Karoonda, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Karoonda, SA Calcarosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Karoonda SA
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Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Karoonda SA

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Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial report and links

2016 trial report



Trial last modified: 14-05-2023 08:14am AEST